Warning: require_once(ROOT_PATHmodules/users/users.class.php) [function.require-once]: failed to open stream: No such file or directory in D:\phpStudy\WWW\modules\admin\index.php on line 14

Fatal error: require_once() [function.require]: Failed opening required 'ROOT_PATHmodules/users/users.class.php' (include_path='.;C:\php\pear') in D:\phpStudy\WWW\modules\admin\index.php on line 14